1.x: add missing marbles, fix image sizes (#4963)
1.x: add missing marbles, fix image sizes (#4963)


weikipeng/RxJava,davidmoten/RxJava,weikipeng/RxJava,davidmoten/RxJava,hzysoft/RxJava,davidmoten/RxJava,weikipeng/RxJava,hzysoft/RxJava,hzysoft/RxJava